Section 160.176-1 - Scope(a) This subpart contains structural and performance standards and procedures for approval of inflatable lifejackets, as well as requirements for associated manuals, servicing programs, and shore-side service facilities.(b) Other regulations in this chapter provide that inflatable lifejackets must be: (1) Serviced annually at designated servicing facilities; and(2) Maintained in accordance with their user manuals.(c) Inflatable lifejackets approved under this subpart-(1) Rely entirely upon inflation for buoyancy;(2) Meet the requirements for lifejackets in the 1983 Amendments to the International Convention for the Safety of Life at Sea, 1974 (SOLAS 74/83);(3) Have performance equivalent to Type I Personal Flotation Devices (PFD's) with any one chamber deflated; and(4) Are designed to be worn by adults.